| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| #include <X11/Xlib.h> |
| #include <X11/Xutil.h> |
| |
| #include "SDL_mouse.h" |
| #include "../../events/SDL_events_c.h" |
| #include "../SDL_cursor_c.h" |
| #include "SDL_x11dga_c.h" |
| #include "SDL_x11mouse_c.h" |
| |
| |
| /* The implementation dependent data for the window manager cursor */ |
| struct WMcursor { |
| Cursor x_cursor; |
| }; |
| |
| |
| void X11_FreeWMCursor(_THIS, WMcursor *cursor) |
| { |
| if ( SDL_Display != NULL ) { |
| SDL_Lock_EventThread(); |
| XFreeCursor(SDL_Display, cursor->x_cursor); |
| XSync(SDL_Display, False); |
| SDL_Unlock_EventThread(); |
| } |
| SDL_free(cursor); |
| } |
| |
| WMcursor *X11_CreateWMCursor(_THIS, |
| Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
| { |
| WMcursor *cursor; |
| XGCValues GCvalues; |
| GC GCcursor; |
| XImage *data_image, *mask_image; |
| Pixmap data_pixmap, mask_pixmap; |
| int clen, i; |
| char *x_data, *x_mask; |
| static XColor black = { 0, 0, 0, 0 }; |
| static XColor white = { 0xffff, 0xffff, 0xffff, 0xffff }; |
| |
| /* Allocate the cursor memory */ |
| cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor)); |
| if ( cursor == NULL ) { |
| SDL_OutOfMemory(); |
| return(NULL); |
| } |
| |
| /* Mix the mask and the data */ |
| clen = (w/8)*h; |
| x_data = (char *)SDL_malloc(clen); |
| if ( x_data == NULL ) { |
| SDL_free(cursor); |
| SDL_OutOfMemory(); |
| return(NULL); |
| } |
| x_mask = (char *)SDL_malloc(clen); |
| if ( x_mask == NULL ) { |
| SDL_free(cursor); |
| SDL_free(x_data); |
| SDL_OutOfMemory(); |
| return(NULL); |
| } |
| for ( i=0; i<clen; ++i ) { |
| /* The mask is OR'd with the data to turn inverted color |
| pixels black since inverted color cursors aren't supported |
| under X11. |
| */ |
| x_mask[i] = data[i] | mask[i]; |
| x_data[i] = data[i]; |
| } |
| |
| /* Prevent the event thread from running while we use the X server */ |
| SDL_Lock_EventThread(); |
| |
| /* Create the data image */ |
| data_image = XCreateImage(SDL_Display, |
| DefaultVisual(SDL_Display, SDL_Screen), |
| 1, XYBitmap, 0, x_data, w, h, 8, w/8); |
| data_image->byte_order = MSBFirst; |
| data_image->bitmap_bit_order = MSBFirst; |
| data_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1); |
| |
| /* Create the data mask */ |
| mask_image = XCreateImage(SDL_Display, |
| DefaultVisual(SDL_Display, SDL_Screen), |
| 1, XYBitmap, 0, x_mask, w, h, 8, w/8); |
| mask_image->byte_order = MSBFirst; |
| mask_image->bitmap_bit_order = MSBFirst; |
| mask_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1); |
| |
| /* Create the graphics context */ |
| GCvalues.function = GXcopy; |
| GCvalues.foreground = ~0; |
| GCvalues.background = 0; |
| GCvalues.plane_mask = AllPlanes; |
| GCcursor = XCreateGC(SDL_Display, data_pixmap, |
| (GCFunction|GCForeground|GCBackground|GCPlaneMask), |
| &GCvalues); |
| |
| /* Blit the images to the pixmaps */ |
| XPutImage(SDL_Display, data_pixmap, GCcursor, data_image, |
| 0, 0, 0, 0, w, h); |
| XPutImage(SDL_Display, mask_pixmap, GCcursor, mask_image, |
| 0, 0, 0, 0, w, h); |
| XFreeGC(SDL_Display, GCcursor); |
| /* These free the x_data and x_mask memory pointers */ |
| XDestroyImage(data_image); |
| XDestroyImage(mask_image); |
| |
| /* Create the cursor */ |
| cursor->x_cursor = XCreatePixmapCursor(SDL_Display, data_pixmap, |
| mask_pixmap, &black, &white, hot_x, hot_y); |
| XFreePixmap(SDL_Display, data_pixmap); |
| XFreePixmap(SDL_Display, mask_pixmap); |
| |
| /* Release the event thread */ |
| XSync(SDL_Display, False); |
| SDL_Unlock_EventThread(); |
| |
| return(cursor); |
| } |
| |
| int X11_ShowWMCursor(_THIS, WMcursor *cursor) |
| { |
| /* Don't do anything if the display is gone */ |
| if ( SDL_Display == NULL ) { |
| return(0); |
| } |
| |
| /* Set the X11 cursor cursor, or blank if cursor is NULL */ |
| if ( SDL_Window ) { |
| SDL_Lock_EventThread(); |
| if ( cursor == NULL ) { |
| if ( SDL_BlankCursor != NULL ) { |
| XDefineCursor(SDL_Display, SDL_Window, |
| SDL_BlankCursor->x_cursor); |
| } |
| } else { |
| XDefineCursor(SDL_Display, SDL_Window, cursor->x_cursor); |
| } |
| XSync(SDL_Display, False); |
| SDL_Unlock_EventThread(); |
| } |
| return(1); |
| } |
| |
| void X11_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
| { |
| if ( using_dga & DGA_MOUSE ) { |
| SDL_PrivateMouseMotion(0, 0, x, y); |
| } else if ( mouse_relative) { |
| /* RJR: March 28, 2000 |
| leave physical cursor at center of screen if |
| mouse hidden and grabbed */ |
| SDL_PrivateMouseMotion(0, 0, x, y); |
| } else { |
| SDL_Lock_EventThread(); |
| XWarpPointer(SDL_Display, None, SDL_Window, 0, 0, 0, 0, x, y); |
| XSync(SDL_Display, False); |
| SDL_Unlock_EventThread(); |
| } |
| } |
| |
| /* Sets the mouse acceleration from a string of the form: |
| 2/1/0 |
| The first number is the numerator, followed by the acceleration |
| denumenator and threshold. |
| */ |
| static void SetMouseAccel(_THIS, const char *accel_param) |
| { |
| int i; |
| size_t len; |
| int accel_value[3]; |
| char *mouse_param, *mouse_param_buf, *pin; |
| |
| len = SDL_strlen(accel_param)+1; |
| mouse_param_buf = SDL_stack_alloc(char, len); |
| if ( ! mouse_param_buf ) { |
| return; |
| } |
| SDL_strlcpy(mouse_param_buf, accel_param, len); |
| mouse_param = mouse_param_buf; |
| |
| for ( i=0; (i < 3) && mouse_param; ++i ) { |
| pin = SDL_strchr(mouse_param, '/'); |
| if ( pin ) { |
| *pin = '\0'; |
| } |
| accel_value[i] = atoi(mouse_param); |
| if ( pin ) { |
| mouse_param = pin+1; |
| } else { |
| mouse_param = NULL; |
| } |
| } |
| if ( i == 3 ) { |
| XChangePointerControl(SDL_Display, True, True, |
| accel_value[0], accel_value[1], accel_value[2]); |
| } |
| SDL_stack_free(mouse_param_buf); |
| } |
| |
| /* Check to see if we need to enter or leave mouse relative mode */ |
| void X11_CheckMouseModeNoLock(_THIS) |
| { |
| const Uint8 full_focus = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS); |
| char *env_override; |
| int enable_relative = 1; |
| |
| /* Allow the user to override the relative mouse mode. |
| They almost never want to do this, as it seriously affects |
| applications that rely on continuous relative mouse motion. |
| */ |
| env_override = SDL_getenv("SDL_MOUSE_RELATIVE"); |
| if ( env_override ) { |
| enable_relative = atoi(env_override); |
| } |
| |
| /* If the mouse is hidden and input is grabbed, we use relative mode */ |
| if ( enable_relative && |
| !(SDL_cursorstate & CURSOR_VISIBLE) && |
| (this->input_grab != SDL_GRAB_OFF) && |
| (SDL_GetAppState() & full_focus) == full_focus ) { |
| if ( ! mouse_relative ) { |
| X11_EnableDGAMouse(this); |
| if ( ! (using_dga & DGA_MOUSE) ) { |
| char *xmouse_accel; |
| |
| SDL_GetMouseState(&mouse_last.x, &mouse_last.y); |
| /* Use as raw mouse mickeys as possible */ |
| XGetPointerControl(SDL_Display, |
| &mouse_accel.numerator, |
| &mouse_accel.denominator, |
| &mouse_accel.threshold); |
| xmouse_accel=SDL_getenv("SDL_VIDEO_X11_MOUSEACCEL"); |
| if ( xmouse_accel ) { |
| SetMouseAccel(this, xmouse_accel); |
| } |
| } |
| mouse_relative = 1; |
| } |
| } else { |
| if ( mouse_relative ) { |
| if ( using_dga & DGA_MOUSE ) { |
| X11_DisableDGAMouse(this); |
| } else { |
| XChangePointerControl(SDL_Display, True, True, |
| mouse_accel.numerator, |
| mouse_accel.denominator, |
| mouse_accel.threshold); |
| } |
| mouse_relative = 0; |
| } |
| } |
| } |
| void X11_CheckMouseMode(_THIS) |
| { |
| SDL_Lock_EventThread(); |
| X11_CheckMouseModeNoLock(this); |
| SDL_Unlock_EventThread(); |
| } |